Half-baked tool to make pretty plots of email flow. Currently can only
process Maildir style mailboxes. Emits some interesting output to stdout,
plus creates a 'graphviz' file called plot2.dot.
To compile, run make. Requires a very recent C++ compiler. Code depends on
boost (libboost-dev).
Run like this:
$ ./getsender ~/Maildir/cur/* > output.txt
$ dot -Tsvg plot2.dot > plot2.svg
We believe the 'Received' lines in email, and use them to build a tree. We assume every hop lies about everything beyond, which means that every 'smtp.example.com' is different, unless it shares a hop immediately below it. This makes the flow a directed acyclic graph.
We omit hops called 'localhost' & compact hops to the same server name.